PM's body parts in Spooner's speech (3,5)

I believe the answer is:

ted heath

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'pm's' is the definition.
(former British prime minister)

I don't understand how the remainder of the clue works.

(Other definitions for ted heath that I've seen before include "1970s PM; swing band leader" , "Former prime minister" , "Old politician" , "Old conductor" .)

I've seen this clue in The Everyman puzzle in The Observer.

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